Yes, I've looked into hyper- and hypokalemic periodic paralysis (I'm seronegative, so I sometimes doubt my MG diagnosis). I have never been able to find a trigger or any relationship with what I eat, though I understand that's tricky (evidently HKPP triggers can cause reactions that are delayed by hours, so it can be hard to connect the dots). Also, I have typical MG weakness through the day in addition to these more intense spells. But what made me really set the question to rest was that the MG specialist who diagnosed me said that my SFEMG was strongly indicative of MG, and that HKPP wouldn't cause those readings.

Abby